I remember the 4 for 1 split back a few years ago - which tanked the stock and kept it down for about two years. I'm not a fan of stock splits just because of that. Right after the split Cramer and some other guy both came out with "has-been" articles, saying the growth was over... they also implied something to the effect that the split demonstrated Hansen's arrogance and needed a lesson in the market. Take a look at a five year chart and you can see the hole they had to dig out of just because of the split.
You're right about the 4 for 1 split in 2006 - ouch! But 2 for 1 is much less additional stock on the market than 4 for 1. HANS for instance more than quadrupled in less than a year after the August 2005 2 for 1 split. And the profile of HANS stock ownership has changed quite a bit from those days, more institutional and fewer day traders looking to take some profits from all their extra shares.
I think HANS can handle a 2 for 1 split just fine, probably get the textbook few percent bounce as new buyers respond to the indication of strength from management.
You're assumption that there may be a stock split being considered seems reasonable. There is no reason for them to need more stock short of a major acquisition as they have plenty to cover their stock compensation program. And if you are not considering the possibility of issuing more stock you wouldn't normally take the time to increase the authorized amount.
Is it a split or are they just diluting the shares ?
"... the company's stockholders also approved an increase in the number of authorized shares of common stock to 240,000,000 shares from 120,000,000 shares. "